how to find dc gain, cmrr, and bandwith for a differential amplifier in hspice

[techie12]

how to find dc gain,cmrr and bandwith for differential amplifier in hspice

I have written a code positive feedback diff amp for gain enhancement but not getting correct output.Please correct it

.title'differential amplifier'
Vdd 12 0  1V
Vb3 6 0  1V
V0 12 10 0V
Vin1 2 0 sin(2V 0.3V 1Meg)
Vin2 5 0 0V
Vb1 11 0 1V
vb2 8 0 1V
CA 1 0 1uf
CB 4 0 1uf
M1 1 2 3 3 NCH L=32n W=12u
M2 4 5 3 3 NCH L=32n W=12u
M3 1 11 10 10 PCH L=32n W=60u
M4 4 11 10 10 PCH L=32n W=60u
M5 3 6 0 0 NCH L=32n W=150u
M1C 1 4 7 7 NCH L=32n W=12u
M2C 4 1 9 9 NCH L=32n W=12u
M3C 7 8 0 0 NCH L=32n W=12u
M4C 9 8 0 0 NCH L=32n W=12u
.model NCH NMOS level=1
.model PCH PMOS level=1
.tran 0.01us 10us
*.dc 	vdd	0	1V	0.2V
.print  v(1) v(2) v(4) v(5) v(V0) i(vdd)
.print p(vdd)
.measure pwr avg p(vdd) from=0us to=10us
.end

 

[FvM]

Re: how to find dc gain,cmrr and bandwith for differential amplifier in hspice

I believe you sketched a schematic before typing-in the net list. You may want to show it.

You should also tell what "expected output" specifically means.

You are using default MOS models. Do you have any indications that they can work with 1V supply voltage? I'm not using HSPICE. My simulator gives me a warning that length parameter is below useful level=1 range.

Generally, before asking others to correct others to "correct" your net list, you should check for reasonable operation points of each transistor to narrow down the problem.